AMS Presidents: A Timeline home page

29. Einar Hille (18941980) President 19471948 Ph.D. University of Stockholm, Sweden, 1918Hille was born in Stockholm, where he received his Ph.D. His principal academic appointments were at Princeton University (19221933) and at Yale University (1933 until his retirement in 1962). His main work was on integral equations, differential equations, special functions, Dirichlet series and Fourier series, and in his later years, functional analysis. Hille was a member of the American Academy of Arts and Sciences and of the U.S. National Academy of Sciences. 
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